Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation

@article{Fumagalli2021OscillationsIT,
title={Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation},
author={Jacopo Fumagalli and S'ebastien Renaux-Petel and Lukas T. Witkowski},
journal={Journal of Cosmology and Astroparticle Physics},
year={2021},
volume={2021}
}
• Published 4 December 2020
• Physics
• Journal of Cosmology and Astroparticle Physics
We identify a characteristic pattern in the scalar-induced stochastic gravitational wave background from particle production during inflation. If particle production is sufficiently efficient, the scalar power spectrum exhibits 𝒪(1) oscillations periodic in k, characteristic of a sharp feature, with an exponentially enhanced envelope. We systematically study the properties of the induced spectrum of gravitational waves sourced after inflation and find that this inherits the periodic structure… Expand
23 Citations
Resonant features in the stochastic gravitational wave background
• Physics
• 2021
We analyse the post-inflationary contribution to the stochastic gravitational wave background due to a resonant feature in the scalar power spectrum, which is characterised by an oscillation inExpand
CMB $\mu T$ cross-correlations as a probe of PBH scenarios
• Physics
• 2021
We propose a new method for probing inflationary models of primordial black hole (PBH) production, using only CMB physics at relatively large scales. In PBH scenarios, the primordial power spectrumExpand
Comparing multi-field primordial feature models with the Planck data
• Physics
• 2021
In this paper, we use a complete model of classical primordial standard clocks as an example to develop a methodology of directly comparing numerical predictions from complicated multi-field featureExpand
Constant-rate inflation: primordial black holes from conformal weight transitions
• Physics
• Journal of High Energy Physics
• 2021
Abstract Constant-rate inflation, including ultra-slow-roll inflation as a special case, has been widely applied to the formation of primordial black holes with a significant deviation from theExpand
Double monodromy inflation: Gravitational wave factory for CMB-S4, LiteBIRD, and LISA
• Physics
• Physical Review D
• 2021
We consider a short rollercoaster cosmology based on two stages of monodromy inflation separated by a stage of matter domination, generated after the early inflaton falls out of slow roll. If theExpand
Double-peaked inflation model: Scalar induced gravitational waves and primordial-black-hole suppression from primordial non-Gaussianity
• Fengge Zhang
• Physics
• Physical Review D
• 2021
A significant abundance of primordial black hole (PBH) dark matter can be produced by curvature perturbations with power spectrum ∆ζ(kpeak) ∼ O(10−2) at small scales, associated with the generationExpand
Inflation with strongly non-geodesic motion: theoretical motivations and observational imprints
A new class of inflationary attractors characterized by a strongly non-geodesic motion has been discovered and explored in the past few years. I describe how they naturally arise in negatively curvedExpand
Interferences in the stochastic gravitational wave background
• Physics
• 2021
Although the expansion of the Universe explicitly breaks the time-translation symmetry, cosmological predictions for the stochastic gravitational wave background (SGWB) are usually derived under theExpand

References

SHOWING 1-10 OF 217 REFERENCES
JCAP 11
• 017
• 2019
JCAP 09
• 037
• 2020
Phys
• Rev. Lett. 125, 121301
• 2020
and L
• T. Witkowski,
• 2020
JCAP 05
• 013
• 2019
JHEP 01
• 097
• 2021
NANOGrav), Astrophys
• J. Lett. 905,
• 2020
Phys
• Rev. D 76, 084019
• 2007
Features of the inflaton potential and the power spectrum of cosmological perturbations
• Physics
• Physical Review D
• 2021
We discuss features of the inflaton potential that can lead to a strong enhancement of the power spectrum of curvature perturbations and the production of primordial black holes. We show that a steepExpand
JCAP 01
• 059
• 2021